for 371/2p and may be obtained from the Society or through the Essex Field Club from Ron Allen at 26 Burnside Road, Dagenham, Essex. ********* The Restless Earth by Nigel Calder. BBC 1972 £1.90 Of the books I have bought recently, without doubt the most inspiring and though provoking has been the recent BBC publication, "The Restless Earth". While making the TV programme of the same name, Nigel Calder travelled the World, talking to earth scientists and visiting many spectacular regions to bring to public attention the exciting new knowledge and understanding of the history of the Earth. He explains the configuration of the continents, the reasons for earthquakes and volcanos, and points the way to possible control of these forces. He shows how we are using up the resources of the earth at a rate faster than they can be made naturally, the lucid text being supplemented by very good diagrams and colour illustrations. SUMMER EXHIBITIONS The Club hopes to put on several displays in conjunction with the Essex Naturalists' Trust during the comming summer. Volunteers are needed to help with preparation of material, transport to sites of shows and manning of the exhibitions. Anyone interested is invited to contact the Secretary: Ron Allen as soon as possible. Page 16